Stable aqueous dyestuff preparations of finely dispersed water-insoluble or sparingly water-soluble dyes

Abstract

The invention provides aqueous dyestuff preparations of water-insoluble or sparingly water-soluble dyes which may be used for preparing printing pastes to be used for printing textile material as well as for printing supports for transfer printing. The preparations contain at least 10% by weight of water, 10 to 60% by weight of a finely dispersed water-insoluble or sparingly water-soluble dye, 0.1 to 5% by weight of at least one anionic dispersant, and 0.5 to 5% by weight of a non-ionic copolymer of ethylene oxide and a further olefin oxide, said copolymer having an ethylene oxide content of at least 65% by weight and a molecular weight of more than 12,000, and also, if desired, further ingredients.

What is claimed is: 
     
       1. An aqueous dyestuff preparation of a water-insoluble or sparingly water-soluble dye having a particle size of less than 10μ which contains at least 10% by weight of water, 10 to 60% by weight, of a finely dispersed water-insoluble or sparingly water-soluble dye, 0.1 to 5% by weight of a ligninsulphonate and 0.5 to 5% by weight of a non-ionic copolymer of ethylene oxide and propylene oxide, said copolymer having an ethylene oxide content of at least 65% by weight and a molecular weight of more than 12,000. 
     
     
       2. A dyestuff preparation according to claim 1, wherein contains 0.5 to 2% by weight of liguinsulphonate and 1 to 3% by weight of a copolymer of ethylene oxide and propylene oxide. 
     
     
       3. A dyestuff preparation according to claim 1, which contains 35 to 50% by weight of a water-insoluble or sparingly water-soluble dye. 
     
     
       4. A dyestuff preparation according to claim 1, which contsins a disperse dye or vat dye as water-insoluble or sparingly water-soluble dye. 
     
     
       5. A dyestuff preparation according to claim 1, wherein the dye particle size is less than 2μ. 
     
     
       6. A dyestuff preparation according to claim 1, which contains a ligninsulphonate with an average molecular weight of between 1,000 and 80,000 and an active ligninsulphonate content of at least 80% and a ratio of carbon to organically bonded sulphur of 9:1 to 55:1. 
     
     
       7. A dyestuff preparation according to claim 6, which contains a kraft-ligninsulphonate in which 80% of the molecules have a molecular weight between 6,000 and 50,000 and in which the ratio of carbon to organically bonded sulphur is about 33:1. 
     
     
       8. A dyestuff preparation according to claim 6, which contains a sulphite-ligninsulphonate in which 80% of the molecules have a molecular weight between 10,000 and 50,000 and in which the ratio of carbon to organically bonded sulphur is about 24.5:1. 
     
     
       9. A dyestuff preparation according to claim 6, which contains a sulphite-ligninsulphonate in which 10% of the molecules have a molecular weight below 10,000, 25% have a molecular weight between 10000 and 40,000 and 65% have a molecular weight above 40,000 and in which the ratio of carbon to organically bonded sulphur is about 23:1. 
     
     
       10. A dyestuff preparation according to claim 6, which contains a kraft-ligninsulphonate in which 80% of the molecules have a molecular weight between 2,000 and 30,000, and in which the ratio of carbon to organically bonded sulphur is about 46:1. 
     
     
       11. A dyestuff preparatior according to claim 6, which contains a mixture of kraft- and sulphite-ligninsulphonates in which 15-20% of the molecules have a molecular weight below 10,000, 33-45% have a molecular weight between 10,000 and 30,000 and 35-52% have a molecular weight above 30,000. 
     
     
       12. A dyestuff preparation according to claim 1, wherein the copolymer has an ethylene oxide content of at loast 80%. 
     
     
       13. A dyestuff preparation according to claim 1, which contains a copolymer of ethylene oxide and propylene oxide of the formula ##STR53## in which the sum of a and c is a number of at least 150, and b is a number between 20 and 100. 
     
     
       14. A dyestuff preparation according to claim 13, wherein the sum of a+c is a number from 200 to 225 and b is a number from 60 to 80. 
     
     
       15. A dyestuff preparation according to claim 13, wherein the sum of a+c is a number from 280 to 320 and b is a number from 50 to 60. 
     
     
       16. A dyestuff preparation according to claim 13, wherein the sum of a+c is a number from 220 to 280 and b is a number from 40 to 55. 
     
     
       17. A dyestuff preparation according to claim 1, which contains a further ingredient selected from the group consisting of hygroscopic agents, antifrost agents, antimicrobial agents, fungicides, antifoams, viscosity improvers and complexing agents. 
     
     
       18. A dyestuff preparation according to claim 17, which contains a polyphosphate as a complexing agent. 
     
     
       19. A dyestuff preparation according to claim 18, which contains 0.1 to 5% by weight of a polyphosphate. 
     
     
       20. A dyestuff preparation according to claim 1, which contains at least 20% by weight of water, 25 to 60% by weight of a disperse or vat dye, 0.1 to 5% by weight of a ligninsulphonate, and 0.5 to 5% by weight of a copolymer of ethylene oxide and propylene oxide with an ethylene oxide content of at least 65% by weight. 
     
     
       21. A dyestuff preparation according to claim 20, wherein the dye content is 35 to 50% by weight, the ligninsulphonate content is 0.5 to 2% by weight, and the copolymer content is 1 to 3% by weight. 
     
     
       22. A dyestuff preparation according to either of claims 20 or 21, further containing 0.1 to 5% by weight of a polyphosphate. 
     
     
       23. A dyestuff preparation according to claim 1, which contains the ligninsulphonate in an amount of 2 to 10% by weight, based on the amount of dye. 
     
     
       24. A dyestuff preparation according to claim 1, which contains the non-ionic copolymer in an amount of 3 to 15% by weight, based on the amount of dye. 
     
     
       25. A dyestuff preparation according to claim 1, which contains 35 to 45% of the violet dye of the formula ##STR54## 15to 25% of propylene glycol, 2 to 5% of a non-ionic polycondensation product of about 20% of propylene oxide and about 80% of ethylene oxide with a molecular weight of about 16,500, 1 to 3% of a sulphonated fractionated ligninsulphonate having a ratio of carbon to organically bonded sulphur of about 33:1 and which consists of 80% of molecules with a molecular weight between 6000 and 50,000, 0.5 to 1% of a bactericide, 0.1 to 0.5% of an antifoam, and 30 to 40% of water. 
     
     
       26. A dyestuff preparation according to claim 1, which contains 35 to 50% of the yellow dye of the formula ##STR55## 15to 25% of propylene glycol, 2 to 5% of a non-ionic polycondensation product of about 20% of propylene oxide and about 80% of ethylene oxide with a molecular weight of about 16,500, 1 to 3% of a sulphonated fractionated ligninsulphonate having a ratio of carbon to organically bonded sulphur of about 33:1 and which consists of 80% of molecules with a molecular weight between 6000 and 50,000, 0.5 to 1% of a bacteracide, 0.1 to 0.5% of an antifoam, and 30 to 40% of water. 
     
     
       27. A dyestuff preparation according to claim 1, which contains 30 to 40% of the yellow dye of the formula ##STR56## 15to 25% of propylene glycol, 2 to 5% of a non-ionic polycondensation product of about 20% of propylene oxide and about 80% of ethylene oxide with a molecular weight of about 16,500, 1 to 3% of a sulphonated fractionated ligninsulphonate having a ratio of carbon to organically bonded sulphur of about 33:1 and which consists of 80% of molecules with a molecular weight between 6000 and 50,000, 0.5 to 1% of a bactericide, 0.1 to 0.5% of an antifoam, and 30 to 40% of water. 
     
     
       28. A dyestuff preparation according to claim 1, which contains 30 to 40% of the navy blue dye of the formula mixture of 1:3 ##STR57## 15to 25% of propylene glyccl, 2 to 5% of a non-ionic polycondensation product of about 20% of propylene oxide and about 80% of ethylene oxide with a molecular weight of about 16,500, 1 to 3% of a sulphonated fractionated ligninsulphonate having a ratio of carbon to organically bonded sulphur of about 33:1 and which consists of 80% of molecules with a molecular weight between 6000 and 50,000, 0.5 to 1% of a bactericide, 0.1 to 0.5% of an antifoam, and 30 to 45% of water. 
     
     
       29. A dyestuff preparation according to claim 1, which contains 30 to 40% of the pink dye of the formula ##STR58## 15to 25% of propylene glycol, 2 to 5% of a non-ionic polycondensation product of about 20% of propylene oxide and about 80% of ethylene oxide with a molecular weight of about 16,500, 1 to 3% of a sulphonated fractionated ligninsulphonate having a ratio of carbon to organically bonded sulphur of about 33:1 and which consists of 80% of molecules with a molecular weight between 6000 and 50,000, 0.5 to 1% of a bactericide, 0.1 to 0.5% of an antifoam, and 30 to 45% of water. 
     
     
       30. A dyestuff preparation according to claim 1 which contains 25 to 35% of the red dye of the formula ##STR59## 15to 25% of propylene glycol, 2 to 5% of a non-ionic polycondensation product of about 20% of propylene oxide and about 80% of ethylene oxide with a molecular weight of about 16,500, 1 to 3% of a sulphonated fractionated ligninsulphonate having a ratio of carbon to organically bonded sulphur of about 33:1 and which consists of 80% of molecules with a molecular weight between 6000 and 50,000, 0.5 to 1% of a bactericide, 0.1 to 0.5% of an antifoam, and 40 to 50% of water. 
     
     
       31. A dyestuff preparation according to claim 1, which contains 20 to 30% of the yellow dye of the formula ##STR60## 15to 25% of propylene glycol, 2 to 5% of a non-ionic polycondensation product of about 20% of propylene oxide and about 80% of ethylene oxide with a molecular weight of about 16,500, 1 to 3% of a sulphonated fractionated ligninsulphonate having a ratio of carbon to organically bonded sulphur of about 33:1 and which consists of 80% of molecules with a molecular weight between 6000 and 50,000, 0.5 to 1% of a bactericide, 0.1 to 0.5% of an antifoam, and 40 to 60% of water. 
     
     
       32. A dyestuff preparation according to claim 1, which contains 10 to 20% of the yellow dye of the formula ##STR61## 5to 15% of propylene glycol, 1 to 3% of a non-ionic polycondensation product of about 20% of propylene oxide and about 80% of ethylene oxide and having a molecular weight of about 16,500, 0.5 to 2% of a sulphonated fractionated kraft-lignin with a ratio of carbon to organically bonded sulphur of about 33:1 and consisting of 80% of molecules having a molecular weight between 6000 and 50,000, 0.3 to 0.6% of a bactericide, 0.1 to 0.5% of an antifoam and 60 to 80% of water. 
     
     
       33. A dyestuff preparation according to claim 1, which contains 35 to 40% of the scarlet dye of the formula ##STR62## 15to 25% of propylene glycol, 2 to 5% of a non-ionic polycondensation product of about 20% of propylene oxide and about 80% of ethylene oxide with a molecular weight of about 16,500, 1 to 3% of a sulphonated fractionated ligninsulphonate having a ratio of carbon to organically bonded sulphur of about 33:1 and which consists of 80% of molecules with a molecular weight between 6000 and 50,000, 0.5 to 1% of a bactericide, 0.1 to 0.5% of an antifoam, and 30 to 40% of water. 
     
     
       34. A dyestuff preparation according to claim 1, which contains 35 to 40% of the dye of the formula ##STR63## 15to 25% of propylene glycol, 2 to 5% of a non-ionic polycondensation product of about 20% of propylene oxide and about 80% of ethylene oxide with a molecular weight of about 16,500, 1 to 3% of a sulphonated fractionated ligninsulphonate having a ratio of carbon to organically bonded sulphur of about 33:1 and which consists of 80% of molecules with a molecular weight between 6000 and 50,000, 0.5 to 1% of a bactericide, 0.1 to 0.5% of an antifoam, and 30 to 40% of water. 
     
     
       35. A dyestuff preparation according to claim 1, which contains 40 to 45% of the orange dye of the formula ##STR64## 15to 25% of propylene glycol, 2 to 5% of a non-ionic polycondensation product of about 20% of propylene oxide and about 80% of ethylene oxide with a molecular weight of about 16,500, 1 to 3% of a sulphonated fractionated ligninsulphonate having a ratio of carbon to organically bonded sulphur of about 33:1 and which consists of 80% of molecules with a molecular weight between 6000 and 50,000, 0.5 to 1% of a bactericide, 0.1 to 0.5% of an antifoam, and 30 to 40% of water. 
     
     
       36. A dyestuff preparation according to claim 1, which contains 25 to 30% of the blue dye of the formula ##STR65## 15to 25% of propylene glycol, 2 to 5% of a non-ionic polycondensation producr of about 20% of propylene oxide and about 80% of ethylene oxide with a molecular weight of about 16,500, 1 to 3% of a sulphonated fractionated ligninsulphonate having a ratio of carbon to organically bonded sulphur of about 33:1 and which consists of 80% of molecules with a molecular weight between 6000 and 50,000, 0.5 to 1% of a bactericide, 0.1 to 0.5% of an antifoam, and 40 to 50% of water. 
     
     
       37. A process for the production of an aqueous dyestuff preparation according to claim 1, which comprises grinding the indicated dye in water with the addition of the ligninsulphonate or the copolymer and adding the remaining components before, during or after the grinding process, to produce a preparation which has a particle size of less than 10μ. 
     
     
       38. A method of preparing printing pastes on an aqueous, organic or aqueous-organic basis or based on a water-in-oil emulsion, which comprises the use of an aqueous dye preparation according to claim 1. 
     
     
       39. A printing paste obtained according to claim 38. 
     
     
       40. A printing paste according to claim 40 which contains a polyacrylic thickener as thickener. 
     
     
       41. A method of printing textile material, which comprises the use of a printing paste obtained according to claim 38. 
     
     
       42. A method of printing transfer print supports, using dyes suitable in transfer printing, which comprises the use of a printing paste obtained according to claim 38. 
     
     
       43. A method of producing dye liquors or printing pastes for dyeing or printing synthetic textile material, which comprises the use of an aqueous dyestuff prepartion according to claim 1. 
     
     
       44. A printed transfer print support obtained according to claim 42. 
     
     
       45. A printing paste according to claim 38, which contains, as a thickener, a mixture of a branched and linear carboxypolymethylene polymer. 
     
     
       46. A printing paste according to claim 45, wherein the branched carboxypolymethylene polymer has a molecular weight of about 4,000,000, and the linear carboxypolymethylene polymer a molecular weight of about 1,000,000.